1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
/*
ldb database library
Copyright (C) Simo Sorce 2004-2008
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
Copyright (C) Andrew Tridgell 2005
Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* Name: ldb
*
* Component: ldb instancetype module
*
* Description: add an instanceType onto every new record
*
* Author: Andrew Bartlett
*/
#include "includes.h"
#include "ldb.h"
#include "ldb_module.h"
#include "librpc/gen_ndr/ndr_misc.h"
#include "dsdb/samdb/samdb.h"
#include "../libds/common/flags.h"
#include "dsdb/samdb/ldb_modules/util.h"
struct it_context {
struct ldb_module *module;
struct ldb_request *req;
struct ldb_request *add_req;
};
static int it_add_callback(struct ldb_request *req, struct ldb_reply *ares)
{
struct ldb_context *ldb;
struct it_context *ac;
ac = talloc_get_type(req->context, struct it_context);
ldb = ldb_module_get_ctx(ac->module);
if (!ares) {
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
if (ares->type == LDB_REPLY_REFERRAL) {
return ldb_module_send_referral(ac->req, ares->referral);
}
if (ares->error != LDB_SUCCESS) {
return ldb_module_done(ac->req, ares->controls,
ares->response, ares->error);
}
if (ares->type != LDB_REPLY_DONE) {
ldb_set_errstring(ldb, "Invalid reply type!");
return ldb_module_done(ac->req, NULL, NULL,
LDB_ERR_OPERATIONS_ERROR);
}
/* Add the boilerplate entries */
return ldb_module_done(ac->req, ares->controls,
ares->response, ares->error);
}
/* add_record: add instancetype attribute */
static int instancetype_add(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_context *ldb;
struct ldb_request *down_req;
struct ldb_message *msg;
struct ldb_message_element *el;
struct it_context *ac;
uint32_t instanceType;
int ret;
ldb = ldb_module_get_ctx(module);
ldb_debug(ldb, LDB_DEBUG_TRACE, "instancetype_add_record\n");
/* do not manipulate our control entries */
if (ldb_dn_is_special(req->op.add.message->dn)) {
return ldb_next_request(module, req);
}
el = ldb_msg_find_element(req->op.add.message, "instanceType");
if (el != NULL) {
if (el->num_values != 1) {
ldb_set_errstring(ldb, "instancetype: the 'instanceType' attribute is single-valued!");
return LDB_ERR_UNWILLING_TO_PERFORM;
}
instanceType = ldb_msg_find_attr_as_uint(req->op.add.message,
"instanceType", 0);
if (!(instanceType & INSTANCE_TYPE_IS_NC_HEAD)) {
/* if we have no NC add operation (no TYPE_IS_NC_HEAD)
* then "instanceType" can only be "0" or "TYPE_WRITE".
*/
if ((instanceType != 0) &&
((instanceType & INSTANCE_TYPE_WRITE) == 0)) {
ldb_set_errstring(ldb, "instancetype: if TYPE_IS_NC_HEAD wasn't set, then only TYPE_WRITE or 0 are allowed!");
return LDB_ERR_UNWILLING_TO_PERFORM;
}
return ldb_next_request(module, req);
}
/* if we have a NC add operation then we need also the
* "TYPE_WRITE" flag in order to succeed. */
if (!(instanceType & INSTANCE_TYPE_WRITE)) {
ldb_set_errstring(ldb, "instancetype: if TYPE_IS_NC_HEAD was set, then also TYPE_WRITE is requested!");
return LDB_ERR_UNWILLING_TO_PERFORM;
}
/* Forward the 'add' to the modules below, but if it
* succeeds, then we might need to add the boilerplate
* entries (lost+found, deleted objects) */
ac = talloc(req, struct it_context);
if (ac == NULL) {
return ldb_oom(ldb);
}
ac->module = module;
ac->req = req;
ret = ldb_build_add_req(&ac->add_req, ldb_module_get_ctx(ac->module), ac,
ac->req->op.add.message,
ac->req->controls,
ac, it_add_callback,
ac->req);
LDB_REQ_SET_LOCATION(ac->add_req);
if (ret != LDB_SUCCESS) {
return ret;
}
/* Do the original add */
return ldb_next_request(ac->module, ac->add_req);
}
/* we have to copy the message as the caller might have it as a const */
msg = ldb_msg_copy_shallow(req, req->op.add.message);
if (msg == NULL) {
return ldb_oom(ldb);
}
/*
* TODO: calculate correct instance type
*/
instanceType = INSTANCE_TYPE_WRITE;
ret = samdb_msg_add_uint(ldb, msg, msg, "instanceType", instanceType);
if (ret != LDB_SUCCESS) {
return ret;
}
ret = ldb_build_add_req(&down_req, ldb, req,
msg,
req->controls,
req, dsdb_next_callback,
req);
LDB_REQ_SET_LOCATION(down_req);
if (ret != LDB_SUCCESS) {
return ret;
}
/* go on with the call chain */
return ldb_next_request(module, down_req);
}
/* deny instancetype modification */
static int instancetype_mod(struct ldb_module *module, struct ldb_request *req)
{
struct ldb_context *ldb = ldb_module_get_ctx(module);
struct ldb_message_element *el;
el = ldb_msg_find_element(req->op.mod.message, "instanceType");
if (el != NULL) {
ldb_set_errstring(ldb, "instancetype: the 'instanceType' attribute can never be changed!");
return LDB_ERR_CONSTRAINT_VIOLATION;
}
return ldb_next_request(module, req);
}
static const struct ldb_module_ops ldb_instancetype_module_ops = {
.name = "instancetype",
.add = instancetype_add,
.modify = instancetype_mod
};
int ldb_instancetype_module_init(const char *version)
{
LDB_MODULE_CHECK_VERSION(version);
return ldb_register_module(&ldb_instancetype_module_ops);
}
|
